状语从句状语从句在句中作状语，可分为：时间、条件、让步、原因、目的、结果、比较、地点、 方式状语从句。

一、时间状语从句弓丨导时间状语从句的连词有： whe n, as, while, un til, not…un til, before, after, sin ce, theminute,the mome nt, each( every, next, the first) time 等。

时间状语从句中一般用一般现在时或一般过 去时。

1. When , while, as 都可解释为“当 '''的时候”但侧重点有所不同。

1)WhenEg: When I arrived home , I had a little rest.注意点：when 从句的主语与主句主语相同，谓语动词是 be 动词时，从句主语和 Eg: When (she was) walk ing along the street, she met her class teacher. 2)AsAs 除了表示“当 ''' 的时候”，还可表示为“一面 ''' 一面”,“随着” Eg: He sang as he danced.一面 '''一面)You will grow wiser as you grow older.( 随着) 3)While 表示“当 ''' 的时候”强调主句的动作和从句的动作同时发生，从句动词必须是延续性动词。

Eg: While we were work ing, they were havi ng a rest.While (they were) havi ng a discussi on, they got very con fused.注意点：while 有对比的含义，解释为“然而”。

eg: I prefer black tee, while he likes coffee. 2.until, not …until 表示“直到 '、'才”，在肯定句中主句常用延续性动词;常用短暂性动词。

肯定句：I waited un til midni ght. 否定句：I did not leave un til midni ght. 注意点：1) not until 在句首，主句用倒装eg: Not un til you had expla ined how did I man age to do it. 2) It is not until …that •引导的强调句It was not un til it was dark that he came back.3. the minute, the moment, each time 都可表示“一 ''' 就''' ”eg: The worker recog ni zed the type of the machi ne the mome nt he saw it.注意点：the minute, the moment, each ( every, next, the first) time 作连词不禾口 when 连用。

4.Hardly/scarcely …when, no sooner …than, as 表示为as" — '''就''' ” eg: I had hardly/scarcely got home whe n it bega n to rain.I had no sooner got home tha n it bega n to rain. It bega n to rain as soon as I got home.注意点： Hardly/scarcely …when, no sooner …th 位于句首，主句用倒装be 可以省略。

从句一般用进行时,在否定句中主句eg: Had I hardly/scarcely got home whe n it bega n to rain.No sooner had I got home tha n it bega n to rain.二条件状语从句条件状语从句分为两大类：真实条件句和虚拟条件句。

引导条件状语从句的连词有：if, evenif/though, uni ess/ if …not, as long as/ so long as, as far as/so faridedpprovid ing （that）, on condition that等。

条件状语从句中如果主句是将来时，条件状语从句用一般现在时。

1. uni ess 和if …notuni ess相当于if …noteg: You will fail uni ess you study hard.You will not fail if you study hard.注意点：在虚拟条件句中可用if…no,但不能用unlesseg: If she were not too silly,she would un dersta nd.2. 引导条件状语从句的其它连词：Eg: You may go there ,as long as you keep quite.Eg: I shall give you the book on con diti on that you retur n it tomorrow.Eg: I will go provided that you go too.三让步状语从句弓丨导让步状语从句的连词有：though, although, even if/ though, however, no matter how, nomatter what, no matter who 等。

1. though, although不可与but连用，但可以和yet , still连用.Eg: Though/Although it is raining ,they are still running outside.注意点：1）though可引导倒装（although不引导倒装），结构为:强调对象+as/though+主语+其它成分，强调对象可为表语（名词、形容词）或状语（副词）表语为名词时，前面不用冠词。

Child as/ though he was, he knew what was the right thing to do.Tired as he is, he goes on with his work.2）despite和in spite of也有让步意义，后接名词或动词，而though, although是连词，后接从句。

Eg: Despite /In spite of wanting to see him again, she refused to reply to his letter. Though/although she wan ted to see him aga in, she refused to reply to his letter.2. "no matter+疑问词”或"疑问词+后缀ever ”eg: No matter what happe ned, he would not mind.Whatever happe ned, he would not mind.注意点：no matter+疑问词不能引导名词性从句3. even if/ though 表示"即使”eg: He doesn ' t want to marry her even if/ though he loves her very much.四原因状语从句弓丨导原因状语从句的连词有：because, since, as , now that ,c on sideri ng that, for the reason that ,due to the fact that,owing to the fact that 等1. becausebecause语气最强，通常用于回答why提出的问题注意点：在it was…that…的强调结构中，强调原因状语从句可用because引导，不用since,as, for引导。

连接词than 可作为关系代词用。

如:Eg: It is because she is too inexperieneed that she does not know how to deal with the situation. 2. since 禾口 assince 的语气比because 弱，比as 强，表示间接的，已知的原因，自然的结果，表示“既然， 由于”。

Eg: As/ Since you are not very well, you had better have a rest. 3. for当for 表示原因关系时，for 分句是对第一分句内容的推断或猜测。

Eg: It must have rained last ni ght, for the gro und is wet now.五目的状语从句引导目的状语从句的连词有：so that, in order that, lest, in case, for fear that 等。

Eg: You must speak louder so that/ in order that you can be heard by all.He wrote the n ame dow n for fear that he should forget it. Better take more clothes in case the weather is cold.注意点：lest, in case, for fear that 所引导的状语从句中，动词可以用虚拟语气，形式为should+动词原形，也可不用虚拟语气，用动词的一般现在时或一般过去时。

Eg: You had better leave the key at home in case one of us should think of/th inks of coming back. 六结果状语从句引导结果状语从句的连词有：so that, so …that, such ••等hateg: He is so young that he can not go to school.He is such a young boy that he can not go to school. 1. 常用句型：so+形容词/副词+that 从句so+形容词+a/an+单数可数名词+that 从句 such +a/an+形容词+单数可数名词+that 从句 such +形容词+复数可数名词/不可数名词+that 从句 2.so 和such 的搭配规律如:He speaks English as fluently as his brother (does) I can ' t jump so /as high as he (does)There are more workers in this factory than in the one next to it . The more you read, the more interesting , you will find the novel is .such 修饰名词或名词词组, Eg: so foolishso nice a flower so many /few flowers so much/little moneyso many peopleso 修饰形容词或副词，so 还可接 such a fool such a nice flower such nice flowers such rapid progress such a lot of peoplemany, few, much, little 等。